Recursive Closed-Form Optimization of Spectral Audio Power Allocation for Near End Listening Enhancement

Conference: Sprachkommunikation 2010 - 9. ITG-Fachtagung
10/06/2010 - 10/08/2010 at Bochum, Deutschland

Proceedings: Sprachkommunikation 2010

Pages: 4Language: englishTyp: PDF

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Sauert, Bastian; Vary, Peter (Institute of Communication Systems and Data Processing, RWTH Aachen University, 52056 Aachen, Germany)

In mobile telephony, near end listening enhancement is desired by the near end listener who perceives not only the clean far end speech but also ambient background noise. A typical scenario is mobile telephony in acoustical background noise such as traffic or babble noise. In such a situation, it is often not acceptable/possible to increase the audio power. In this contribution we analyse the calculation rules of the Speech Intelligibility Index (SII) and develop a recursive closed-form solution which maximizes the SII under the constraint of an unchanged average power of the audio signal. This solution has very low complexity compared to a previous approach of the authors and is thus suitable for real-time processing.